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Finding the Fourth Proportional to 257,005.19, 385,861.54 and 130,730.88

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Solution

The fourth proportional to 257,005.19, 385,861.54 and 130,730.88 is: 196,276.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,005.19 : 385,861.54 = 130,730.88 : x
  2. Step 2: Convert to fraction form
    257,005.19/385,861.54 = 130,730.88/x
  3. Step 3: Cross multiply
    257,005.19x = 385,861.54 × 130,730.88
  4. Step 4: Simplify right side
    257,005.19x = 50,444,018,682.36
  5. Step 5: Solve for x
    x = 50,444,018,682.36/257,005.19
  6. Step 6: Final answer
    x = 196,276.27

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.